Great vest.
A great blend of windbreaking and breathability in a lightweight, stretchy fabric - makes for the right amount of warmth without feeling clammy and decent aerodynamics. Additional bottom-up zipper pull is a nice touch. One small issue with one of the heat-applied emblems looking a bit messy, but not a dealbreaker. Loving it for autumn rides at about 10-15°C depending on wind and cloud conditions. Have rolled it up and fit it into a jersey pocket no problem when the sun got higher as well. Size M fits well over a thin Castelli size M jersey in my experience.

